How can I prevent my car’s windows from fogging up on the inside?

The air conditioning system dehumidifies air. Combining it with the defrost setting quickly clears fog by circulating dry air over the windshield.

Clean glass resists fogging better than dirty glass. Anti-fog treatments create a hydrophilic surface that prevents water droplets from forming.

Excess moisture inside the car cabin is the root cause of fogging. Minimizing these sources helps.